import assert from 'node:assert/strict';
import test from 'node:test';
import {
  formatCount,
  formatDateTime,
  formatDecimal,
  formatFixed,
  summarizeOverall,
} from './model';

test('summarizeOverall preserves aggregate totals and per-kind values', () => {
  assert.deepEqual(summarizeOverall([
    { vehicle_kind: 'internal', records: 3, total_kwh: 12.34, total_fee: 20.5 },
    { vehicle_kind: 'external', records: 2, total_kwh: 5.66, total_fee: 9.5 },
  ]), {
    totalRecords: 5,
    totalKwh: 18,
    totalFee: 30,
    internalRecords: 3,
    externalRecords: 2,
    internalKwh: 12.34,
    externalKwh: 5.66,
  });
});

test('summarizeOverall preserves empty fallbacks', () => {
  assert.deepEqual(summarizeOverall([]), {
    totalRecords: 0,
    totalKwh: 0,
    totalFee: 0,
    internalRecords: 0,
    externalRecords: 0,
    internalKwh: 0,
    externalKwh: 0,
  });
});

test('formatters preserve the import page display rules', () => {
  assert.equal(formatDateTime('2026-08-13T09:08:07.000Z', 19), '2026-08-13 09:08:07');
  assert.equal(formatDateTime(null, 16), '');
  assert.equal(formatCount(1234), (1234).toLocaleString());
  assert.equal(formatDecimal(1234.56, 1), (1234.56).toLocaleString('zh-CN', { maximumFractionDigits: 1 }));
  assert.equal(formatFixed(null, 2), '0.00');
});